Question

Match the pollutant(s) in Column I with the effect(s) in Column II.

Column I	Column II
(i) Oxides of sulphur	(a) Global warming
(ii) Nitrogen dioxide	(b) Damage to kidney
(iii) Carbon dioxide	(c) ‘Blue baby’ syndrome
(iv) Nitrate in drinking water	(d) Respiratory diseases
(v) Lead	(e) Red haze in traffic and congested areas

Answer 1

Column I	Column II
(i) Oxides of sulphur	(d) Respiratory diseases
(ii) Nitrogen dioxide	(e) Red haze in traffic and congested areas
(iii) Carbon dioxide	(a) Global warming
(iv) Nitrate in drinking water	(c) ‘Blue baby’ syndrome
(v) Lead	(b) Damage to kidney

Explanation:

(i) Low concentration of sulphur dioxide causes respiratory disease, e.g., asthma, bronchitis etc.

(ii) The irritant red haze in traffic and congested places is due to oxides of nitrogen.

(iii) The increased amount of CO₂ in air is mainly responsible for global warming.

(iv) Excess’nitrate in drinking water cause methemoglobinemia (blue baby syndrome)

(v) Lead can damage kidney, liver, reproductive system etc.